LG Electronics 42LC2D(B), 32LC2D(B), 37LC2D(B) service manual TROUBLESHOOTING RF/Component/PC

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TROUBLESHOOTING RF/Component/PC

TROUBLESHOOTING RF/Component/PC

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			Push the POWER				Turn OFF the Mute
			ON key				Turn OFF the Mute
			ON key

				YES

			Is the				Is the
No Audio			Is the				Is the
No Audio			Set ON?				Mute ON?
			Set ON?				Mute ON?

			Check the
			RF SIF, Component
	Check the interfacing ciruit of		RF SIF, Component
	Check the interfacing ciruit of		L/R and PC L/R signal across
	Analog Tuner, component		L/R and PC L/R signal across
	Analog Tuner, component		R212, R171-170, R505-506,
	and PC audio accordingly		R212, R171-170, R505-506,
	and PC audio accordingly		respectively according to The
	w.r.t the mode.		respectively according to The
	w.r.t the mode.		corresponding mode


			On jack board

Increase the Volume

Is Volume level

Of the set 0?

Correct them

Check the

Condition of all

Connectors, wafers,

I2C In corresponding

Signal flow?

Replace NSP

-

Replace the MSP

Check the		Check audio
supply voltage 8V		output at MSP across
supply voltage 8V		output at MSP across
across L403		R429-431.

Power Error

Check the

PWM output of NSP

across R436-439

Check the

Amplifier output level

At L423-426

There may be some error in Audio source.

Check

3.3V supply across

L402 and 1.8V at

C448

Power Error

Check 18V

supply at L421

Replace TAS5122(amp)

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LG Electronics 42LC2D(B), 32LC2D(B), 37LC2D(B) service manual TROUBLESHOOTING RF/Component/PC

Contents CHASSIS LD61A FACTORY NAME 32LC2DB-EC/37LC2DB-EC/42LC2DB-EC READ THE SAFETY PRECAUTIONS IN THIS MANUALBEFORE SERVICING THE CHASSIS SERVICE MANUALCONTENTS CONTENTSPRODUCT SAFETY SPECIFICATIONIMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSGeneral Guidance Leakage Current Hot Check circuitElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSReplacement IC Remove/ReplacementSmall-Signal Discrete Transistor Removal/Replacement Power Output, Transistor Device Removal/Replacement1.General SpecificationTV SPECIFICATIONreatment of the front polarizer 2. General Specification4.Component Video Input Y, PB, PR 3.Optical FeatureLCD ModuleRGB-PC EDID DATA 5. RGB PC INPUT Mode Table6. RGB DTV INPUT Mode Table HDMI EDID DATA 7. HDMI INPUT Mode Table8. HDMI DTV Mode Table 8. Mechanical specification 7. Mechanical specification32LC2D Table 1 Scart Arrangement 1.Full ScartTable 2 Scart Arrangement 2.Half Scart 2. Specification ADJUSTMENT INSTRUCTION1. Application Range 3. Channel Memory6. ADC Calibration 5. Select method of Panel sizeBefore AV ADC Calibration, should be executed the Panel size selectionBefore White-balance, the AV ADC should be done 7. White BalanceCase1 EC and FC model use PAL-BGDHI composite signal Cool11000K - x 0.274±0.003, y 0.286±0.003FUNTION SVC REMOCONTROUBLESHOOTING No image attached? Is the input cableNo image PASS No image No image No image No image No image Volume level Of TROUBLESHOOTING AV1, 2, 3, 4/S-VideoAV4/S-Video L/R signal AV1,AV2 ,AV3TROUBLESHOOTING DTV/HDMI-Audio TROUBLESHOOTING RF/Component/PC TDFB-G236P DVB/PAL BLOCK DIAGRAMMainWafer FFC WaferAUDIO/VI DEO SW BLOCK DIAGRAMJackCXA2069Q Sound processor010 020050 EXPLODED VIEW32LC2DDESCRIPTION EXPLODED VIEW PARTS LIST32LC2DEXPLODED VIEW37LC2D EXPLODED VIEW PARTS LIST37LC2D 020080 130030 150 090 EXPLODED VIEW42LC2DEXPLODED VIEW PARTS LIST42LC2D CAPACITOR REPLACEMENT PARTS LISTMAIN BOARD DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DIODEs COIL & CORE & INDUCTOR RESISTORs TRANSISTORDATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 JACK BOARD OTHERsDATE 2006. 05 COIL & CORE & INDUCTOR DIODEsRESISTORs TRANSISTORDATE 2006. 05 CONTROL BOARD IR/LED BOARD SIDE A/V BOARDPage Page Page Page Page Printed in Korea P/NO 38289S0043